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22 Cards in this Set

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  • Back
adaptation
a trait that increases the ability of an individuals to survive and reproduce compared to individuals without the trait
autotrough
a self feeder. Normally a photosynthetic producer.
biodiversity
total number of species in a population and the resulting complexity of interactions between them.
biosphere
that part of earth inhabited by living organisms (includes both living and nonliving components)
cell
the smallest unit of life consisting of a minimum of an outer membrane that encloses a water medium containing organic molecules, including genetic material composed of DNA
conclusion
The final operation in the scientific method. A decision made about the validity of a hypothesis on the basis of experimental evidence
control
That portion of an experiment in which all possible variables are held constant
eukaryotic
Referring to cells of organisms of the domain eukarya. Eukaryotic cells have genetic material enclosed within a membrane bound nucleus and contain other membrane bound organelles
evolution
The descent of modern organisms with modifications of preexisting life forms
experiment
The third operation in the scientific method. The testing of a hypothesis by further observations leading to conclusions
heterotrough
An organism that eats other organisms. A consumer.
homeostatsis
The maintenance of a relatively constant environment required for the optimal function of cells, maintained by the coordinated activity of numerous regulatory mechanisms- including the respiratory, endocrine, circulatory, and excretory systems.
hypothesis
The second operation in the scientific method. It is a supposition based on previous observations that is offered as an explanation for observed phenomenon and is used as the basis for further observations or experiments.
metabolism
It is the sum of all chemical reactions that occur within a single cell or within all the cells of a multicultural organism.
natural selection
The unequal survival and reproduction or organisms due to environmental forces, resulting in the preservation of favorable adaptation. Usually, natural selection refers specifically to differential survival and reproduction on the basis of genetic differences among individuals.
nucleus
Atomic- the central region of an atom, consisting of protons and neutrons.
Cellular- The membrane bound organelle of eukaryotic cells that contains the cells genetic material.
observation
The first operation of the scientific method; the noting of specific phenomenon leading to the formulation of a hypothesis.
prokaryotic
Referring to the cells of the domains of bacteria or archaea. Prokaryotic cells have genetic material that is not enclosed in a membrane bound nucleus; they lack other membrane bound organelles.
scientific method
it is a rigorous procedure for making observations of specific phenomenon in searching for the order underlying those phenomena; consists of four operations- observation, hypothesis, experiment, conclusion.
scientific theory
a general explanation of natural phenomena developed through extensive and reproducible observations; more general and reliable than a hypothesis.
unicellular
singled celled; most members of domains bacteria and archaea and the kingdom protista are unicellular
variable
A condition, particularly in scientific experiments, that is subject to change.